232 Scientific Intelligence. [Sept. 



ier to examination was extracted were ill-conditioned ; while 

 others were well-conditioned. The first contained a quantity of 

 uncombined ammonia ; while no free alkali could be detected in 

 the others. From an ill-conditioned ulcer, he extracted the 

 following substances : 



Water, 



Ammonia, 



Albumen, 



Fatty matter, 



Muriates of potash, soda, and ammonia, 



A trace of sulphates, 



Osmazome, 



Gelatine. 



He says that the albumen amounted to two-thirds of the 

 whole pus. This surely is inaccurate, unless he weighed the 

 albumen while in a moist state. 



The following were the ingredients extracted from a well- 

 conditioned venereal ulcer : 



Water, 



Albumen, 



Fatty matter, 



Muriates of potash and soda ; and traces 



of muriate of ammonia, 

 Traces of sulphates, 

 Gelatine. 



Thus t v e only difference between the two was the presence of 

 ammonie in ill-conditioned pus, and its absence in laudable pus. 



I sus; ect from the phenomena that if scorbutic ulcers were 

 examine J, the pus would be found of an acid nature ; at least it 

 is difficult to explain on any other principle the wasting of bones, 

 and the destruction of old callosities, which perpetually recur in 

 that dreadful disease. 



(For Chevallier's experiments, see Journal de Pharmacie, 

 April, 1819, p. 176.) 



VIII. Pulmonary Concretions. By Dr. Prout. 



It is, I believe, the common opinion, that a discharge of earthy 

 concretions from the lungs indicates a tendency to pulmonary 

 consumption. This, however, appears to be by no means 

 constantly the case. I know a gentleman, 80 years of age, who 

 has all his life occasionally coughed up such concretions. He is 

 slightly asthmatic, but by no means phthisical ; and I have 

 known or heard of many such cases. A medical friend has made 

 the same remark ; and from his observations has been ever led 

 to form the opinion that such persons are less liable to consump- 

 tion than others. How far this may be the case, I do not know, 

 nor do I pretend to know the exact morbid state of the pulmonary 



